A 0.5kg football is kicked 15m into the air. How much G. P.E has the ball gained?

E = 73.5 J

Step-by-step explanation:

Given that,

Mass of a football, m = 0.5 kg

It is kicked 15 m into the air, h = 15 m

We need to find the gravitational potential energy of the ball.

We know that the formula for the gravitational potential energy is given by :

E = mgh

g is the acceleration due to gravity

Substituting all the values in the above formula.

E = 0.5 kg× 9.8 m/s² × 15 m

= 73.5 J

So, the gravitational potential energy of the ball is 73.5 J.

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer